Mae Sa waterfalls are not the best falls in the world but there are plenty of them. Go early to avoid the heat and there will also be less tourists earlier. It is a decent walk in the heat to reach the last one. You can hire a picnic mat and buy cooked food when you arrive. Don't forget drinking water and your swimwear to cool off in one of the pools of water.
This is Aiyah's debut video for Uscenes: